I've been buying smart battery-powered Bluetooth speakers almost since they first came out, starting with the Beats Pill, which I had mounted on the handlebars of the bike I rode in Manhattan. Lots of people asked what it was, and where could they get one. Since then I've bought speakers from JBL, Tribit, Ultimate Ears, and others. None of them cost more than $100. My favorite so far is the Tribit, it's tiny, has a huge sound, and it's got a great feel in the hand.#